|Your using too many resources for your CPU and/or memory|
capacity. Stop some services from running that you don't use.
REM out programs which run but that you can start manually when you want.Place the REM in front of the line with a space between the command line, in the registry. HKLM\Software\Microsoft\Windows\CurrentVersion\RUN
To the right of run are the programs that start.
Double click the line and place the REM in front of it.
Example: XYZ to the right is "C:\Programs\XYZ\xxyy.exe"
With the REM it would read: REM "C:\programs\XYZ\xxyy.exe"
(your not deleting but simple REM means Remark therefore the line is not executed.)
Go to services: CMD > type services.msc after services opens read each line if necessary. If you don't understand services, google "what services can I stop" or simular.
Norton is a hog in itself. Open the Taskmanager called taskmgr.exe and look at it at the gobling CPU usage of any program. You can also download for free a Microsoft program called "process explorer" procexp.exe and it will tell you which service, program, and process is eating up your precious resources.
Many programs automatically start, such as Nero. But if you don't want to burn for a month, why have it start up every day ? You can REM that one. Also go to Start Menu > Programs > Start Up see what you want. Make a temp file in same folder and drag out the stuff you don't need to start.
For instance my HP printer put 3 files in there to start up with my computer. What for ? I haven't started printing.
Drag 'em out. Don't worry the printer will run just fine.
If your new at this, I suggest to you simple write down everything you've done. And when playing with the registry, you can simply go to the top pull down tabs and use export.
So the line you work on, export i.e. XYZ.reg to desktop (or wherever u remember). A double click of the .reg file will put the export right back in. You need to do nothing but double click.
Upgrade Memory. That would be your best bet.